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Changes in Carrying Amount of Goodwill, by Reportable Segment (Detail) - USD ($) | 12 Months Ended
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May 31, 2018 | May 31, 2017
Goodwill [Line Items] |  |
Goodwill beginning balance | $ 1,143,913,000 | $ 1,219,630,000
Acquisitions | 43,656,000 | 75,361,000
Impairments | 0 | (141,394,000)
Translation adjustments | 4,605,000 | (9,684,000)
Goodwill ending balance | 1,192,174,000 | 1,143,913,000
Industrial Segment |  |
Goodwill [Line Items] |  |
Goodwill beginning balance | 516,335,000 | 475,409,000
Acquisitions | 19,736,000 | 41,268,000
Translation adjustments | 1,247,000 | (342,000)
Goodwill ending balance | 537,318,000 | 516,335,000
Specialty Segment |  |
Goodwill [Line Items] |  |
Goodwill beginning balance | 173,978,000 | 171,714,000
Acquisitions | 2,643,000 | 3,273,000
Translation adjustments | 517,000 | (1,009,000)
Goodwill ending balance | 177,138,000 | 173,978,000
Consumer Segment |  |
Goodwill [Line Items] |  |
Goodwill beginning balance | 453,600,000 | 572,507,000
Acquisitions | 21,277,000 | 30,820,000
Impairments |  | (141,394,000)
Translation adjustments | 2,841,000 | (8,333,000)
Goodwill ending balance | $ 477,718,000 | $ 453,600,000

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- Definition Amount after accumulated impairment loss of an asset representing future economic benefits arising from other assets acquired in a business combination that are not individually identified and separately recognized. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 350 -SubTopic 20 -Section 45 -Paragraph 5 -URI http://asc.fasb.org/extlink&oid=77989000&loc=SL49117168-202975 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 350 -SubTopic 20 -Section 45 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=99380562&loc=d3e13770-109266 + Details
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- Definition Amount of increase in asset representing future economic benefits arising from other assets acquired in a business combination that are not individually identified and separately recognized resulting from a business combination. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 350 -SubTopic 20 -Section 50 -Paragraph 1 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=108376223&loc=d3e13816-109267 + Details
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- Definition Amount of foreign currency translation gain (loss) which increases (decreases) an asset representing future economic benefits from other assets acquired in a business combination that are not individually identified and separately recognized. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 350 -SubTopic 20 -Section 50 -Paragraph 1 -Subparagraph (f) -URI http://asc.fasb.org/extlink&oid=108376223&loc=d3e13816-109267 + Details
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